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<p>Steel columns are essential load-bearing components in metallic structures; however, they are often exposed to environmental conditions that accelerate their degradation and affect their long-term performance, particularly through corrosion. This phenomenon induces localized damage that propagates over time, compromising structural integrity and increasing the risk of failure. In this study, a three-dimensional numerical model was developed to investigate the effect of localized corrosion on the buckling resistance of S235 steel columns. This model specifically incorporates the effects of localized corrosion near critical zones, such as base plate holes, where stress concentrations are most severe. The results demonstrate that the corroded column fails to meet the buckling resistance criteria compared to the non-corroded column. This reduction in structural performance is primarily attributed to the significant increase in stress concentrations and plastic deformation caused by corrosion, emphasizing the importance of accounting for elastoplastic behavior in structural assessments. These findings provide valuable insights for reliable evaluation methods and maintenance strategies for corroded steel structures.</p>

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Numerical modeling of local stress and deformation effects induced by corrosion in a steel column

  • 期刊论文

  • 出版模式：

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  • 发表日期：

    2025年12月11日

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  • Meriyem Mouloudi,
  • Rachid Radouani,
  • Abdellah Ech-chahad,
  • Mostafa Chhiba,
  • Mohamed Essahli

摘要

Steel columns are essential load-bearing components in metallic structures; however, they are often exposed to environmental conditions that accelerate their degradation and affect their long-term performance, particularly through corrosion. This phenomenon induces localized damage that propagates over time, compromising structural integrity and increasing the risk of failure. In this study, a three-dimensional numerical model was developed to investigate the effect of localized corrosion on the buckling resistance of S235 steel columns. This model specifically incorporates the effects of localized corrosion near critical zones, such as base plate holes, where stress concentrations are most severe. The results demonstrate that the corroded column fails to meet the buckling resistance criteria compared to the non-corroded column. This reduction in structural performance is primarily attributed to the significant increase in stress concentrations and plastic deformation caused by corrosion, emphasizing the importance of accounting for elastoplastic behavior in structural assessments. These findings provide valuable insights for reliable evaluation methods and maintenance strategies for corroded steel structures.